I'm struggling with, almost, the same for rFactor with Australian Rocks. Created 'some' rocks on the road and offcourse you have to collide on itOnly thing for now. Just check you have the 'collide' tick box on in the properties window of the wall
Tnx Erwin, however something is not correct. Sometimes I can select all objects and make them collidable and sometimes you only get the half of the objects, or less. Yep I used the shift option even tried ctrl, but some objects don't like to be added to collide.IIRC you can select them all and change the properties of the rock-objects.